Lixin intends to buy either Gift A, which costs $10 or Gift B, which costs $8, as Christmas gifts for each of her parents, 2 siblings, 13 relatives and 10 friends. Given that she intends to spend $230, find the number of each gift she should buy

Please help !! I need someone

Answers

Answer 1
10a + 8b = 230
a + b = (2 + 2 + 13 + 10)...a + b = 27 (this is the number of gifts to buy)

a = 27 - b

10(27 - b) + 8b = 230
270 - 10b + 8b = 230
-10b + 8b = 230 - 270
-2b = -40
b = -40/-2
b = 20 <=== she bought 20 eight dollar gifts

a = 27 - b
a = 27 - 20
a = 7 <=== she bought 7 ten dollar gifts

Related Questions

4(-3)(15/3)

20 points

Answers

4(-3)(5)

20 (-3)

-60 is your answer

hope this helps
4 x -3 x 5
-60 I showed work and hope this helps!

What is 7 1/5 written as a percent

Answers

1/5= 0.2
7 1/5= 7.2

To convert from decimal to percent, move the decimal point two places to the left to divide by 100, since percent means per 100.

Final answer: 0.072
71/5 as perecent is 7.2

What is the slope-intercept form of a linear equation? explain why this form is called the slope-intercept form?

Answers

The slope-intercept form of a linear equation is y=mx+b. m being the slope (part one of name) and b being the y-intercept (part 2 of name).

Answer: The slope intercept form of a linear equation has the following form where the equation is solved for y in terms of x: y = a + bx. b is the slope. a is a constant term. It is the y intercept, the place where the line crosses the y axis.

Hope this helps:)

20 point question!!! Please help me! Number 4.

Answers

5x + 9x + 26 = 180
14x = 180 - 26
14x = 154
   x = 154 / 14
   x = 11

answer
B. 11
The correct answer is B, I believe.

Help! I'm not sure how you would graph x = -6. There's no other information available for this question.

Answers

The graph would be placed by a line that goes through all the coordinates where the x value is equal to -6.

Below is a screenshot of the graph:

Ali currently has $25. He is going to start saving $5 every week.

Which equation represents this situation?

y = 25x – 5

y = 5x + 25

y = 25x + 5

y = 5x – 25

Answers

y = 5x + 25 is the correct answer
it is y=5x+25 i hope it helped u

The total amount of money in cents in 3x nickels 4x dimes and 3x quarters

Answers

3 nickles, 4 dimes and 3 quarters. multiply each value by the amount

0.05 x 3= 15 cents

0.1 x 4 = 40 cents

0.75 x 3 = 75 cents

$1.30, or 130 cents.

hope this helps!

1.30 or 130

Step-by-step explanation:

Problem page the perimeter of a rectangular garden is 274 feet. if the width of the garden is 63 feet, what is its length?

Answers

hello : 
 the perimeter of a rectangular garden is :  P = 2(L+W)
L : the length       W : the width
274 = 2( L +63)
L+63 = 274/2 =
L+63 = 137
L= 137-63
L= 74

Twice the number n is no less than 10 units from -1

Answers

Final answer:

The mathematical equation 'Twice the number n is no less than 10 units from -1' can be solved as two inequalities, yielding a solution of n ≤ -5.5 or n >= 4.5.

Explanation:

This is a math problem asking about the absolute value inequality of an equation. The question states 'Twice the number n is no less than 10 units from -1'. This can be written as |2n + 1| >= 10. To solve it, we'll divide it into two inequalities: 2n + 1 >= 10 and -2n - 1 >= 10. Solving the first inequality yields n >= 4.5, and solving the second inequality yields n <= -5.5. Thus, the solution to the equation is n ≤ -5.5 or n >= 4.5.

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Victor is walking at a rate of 1 mile every 17 minutes. sarah is walking at a rate of 1 mile every 14 minutes. if they are 10 miles apart and are approaching each other along a straight road, how many hours will it take them to meet, rounded to the nearest hundredth?

Answers

in 2.58 hours they will meet

The measure of the vertex angle in an isosceles triangle is six less than four time the measure of the base angle. find the measure of the vertex angle

Answers

An isosceles triangle is a special type of triangle that has two equal sides. Consequently, the two base angles are also equal. Since the interior angles of a triangle should sum up to 180°, the general equation should be

180° = 2*Base angle + Vertex angle

Let the base angle be x. Thus, the vertex angle is equal to
Vertex angle = 4x - 6
Substituting,
180 = 2x + 4x - 6
x = 31°

Vertex angle = 4(31°) - 6 
Vertex angle = 118°

What is the measure of angle S?

Answers

132 + 56 + 79 = 267

360 - 267 = 93

answer is 93 degrees

Which mathematical property is demonstrated?



If w = - 8 and - 8 = u, then w = u.

Question 4 options:

symmetric property of equality


transitive property of equality


closure property of addition


closure property of multiplication

Answers

It is the transitive property of equality

The circumference of a circle is 25.12 yards. What is the radius of the circle?

Answers

the circumference is pi times diameter, so put 25.12 over pi to get the diameter. That would be 8. Then divide by 2 to get the radius. That would be 4

Which of the following describes the correct process for solving the equation 3x + 6 = 21 and arrives at the correct solution? Divide both sides by 6 and then add 3. The solution is x = 5. Add 6 to both sides of the equation and then divide by 3. The solution is x = 9. Subtract 6 from both sides of the equation and then divide by 3. The solution is x = 8. Subtract 6 from both sides of the equation and then divide by 3. The solution is x = 5.

Answers

3x + 6 = 21....subtract 6 from both sides
3x = 15...divide both sides by 3
x = 5


If m is the midpoint of pq, what is the relationship between pm and pq

Answers

m is the mid point of pq
then pm= 1/2 pq

Midpoint, as the word suggests, means the point which lies in the middle of something. If m is the midpoint of PQ then PM will be half of PQ.

What does a midpoint mean?

Midpoint, as the word suggests, means the point which lies in the middle of something. The midpoint of a line segment means a point that lies in the mid of the given line segment.

Given that m is the midpoint of PQ. Therefore, it will divide PQ into two equal parts. Therefore,  we can write,

PQ = PM + MQ

But since PM = MQ,

PQ = PM + PM

PQ = 2 PM

PM = PQ/2

Hence, if m is the midpoint of PQ then the relationship between PM and PQ will be half of PQ.

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Write the point-slope form of the equation of the line with a slope of - 2 and an x-intercept of - 1. Include your work in your final answer.
Please helps and show how.

Answers

well, if the x-intercept is at x = -1, what's y?  well, is an x-intercept, y = 0, so the point is -1, 0.

[tex]\bf \begin{array}{lllll} &x_1&y_1\\ % (a,b) &({{ -1}}\quad ,&{{ 0}}) \end{array} \\\\\\ % slope = m slope = {{ m}}= \cfrac{rise}{run} \implies -2 \\\\\\ % point-slope intercept \stackrel{\textit{point-slope form}}{y-{{ y_1}}={{ m}}(x-{{ x_1}})}\implies y-0=-2[x-(-1)]\implies y=-2(x+1)[/tex]

Answer:

y= -2x-2

Step-by-step explanation:

point slope- y=mx+b

y-y1=m(x-x1)

you have the point   (-1,0) and you have to use (x1, y1)

your slope is -2      

Substitute

y-0= -2(x +1)        

Distribute

y-0=-2x-2

+0         +0

y= -2x-2

1) if the sum of two prime numbers is divisible by 7 and is a perfect square, what is a possible product of these numbers?

2) If it takes 5 pipes 2 hours to fill 2 pools and they output water at the same rate, how many hours will it take 1 pipeto fill 1 pool?

3) On a test with 30 questions, Ron got 6 questions wrong. What is his score expressed as a percentage?

4)35 percent of a class voted to go to the museum. If 7 students chose to go to the museum, how many students are there in the class?

5)Katie is 2 years younger than her brother. In 12 years, her brother will be twice as old as she is now. How old is Katie?

Answers

1) The sum of 2 prime numbers is ALWAYS even, so if x and y are prime number,. then (x+y)/7  = z². In this case either x = 2 or y = 5 (or vice vera). This is the only possibility to be divisible by 7 . Then (5+2)/7 = 1² = 1

2) 5 pipes → 2 hours → 2 pools
then 1 pipe takes (5x2) 10 hours to fill 2 pools
or  1 pipe takes (10/2) 5 hours to fill 1 pool

3) It's 6/30 = 0.2 or 20%

4) 35% represent 7 Students, 100% of the class represent x students:
35%/7 = 100%/x
0.35/7 = 1/x (Cross multiplication) →0.35x = 7 and x = 7/0.35 → x = 20 students

5) Let K be the age of Katie and B her brother's
K + 2 = B  OR K  = x - 2 (Today)

In 12 years (B+12), B will be twice K  (remember K = B-2) →
B+12 = 2(K) OR B+12 = 2(B-2)
B+12 = 2(B-2) →
B+12 = 2B - 4→
12 + 4 = B and B = 16. If the brother is 16, then Kate is 14
:

1) There are no prime numbers whose sum is divisible by 7 and is a perfect square.

2) 1 pipe will take 2 hours to fill 1 pool, as it fills at the same rate as all 5 pipes combined.

3) Ron's score is 20%.

4) There are 20 students in the class.

5) Katie is 14 years old.

Let's evaluate each of the statements you provided:

1) The sum of 2 prime numbers is ALWAYS even, so if x and y are prime numbers, then (x+y)/7 = z².

In this case either x = 2 or y = 5 (or vice versa). This is the only possibility to be divisible by 7.

Then (5+2)/7 = 1² = 1.

The first part is correct; the sum of two prime numbers is always even. However, the statement about (x+y)/7 = z² doesn't hold true for all prime numbers. It might work for the specific values of x and y you mentioned, but it's not a general rule.

5 pipes → 2 hours → 2 pools, then 1 pipe takes (5x2) 10 hours to fill 2 pools, or 1 pipe takes (10/2) 5 hours to fill 1 pool.

This is a correct interpretation of the information provided. If 5 pipes can fill 2 pools in 2 hours, then each pipe alone takes 10 hours to fill 2 pools, or 5 hours to fill 1 pool.

It's 6/30 = 0.2 or 20%.

Correct, 6/30 simplifies to 0.2, which is equivalent to 20%.

35% represents 7 students, and 100% of the class represents x students. Therefore, 35%/7 = 100%/x. Cross-multiplying, we get 0.35x = 7, and x = 7/0.35, which simplifies to x = 20 students.

Let K be the age of Katie, and B her brother's age. K + 2 = B (Today). In 12 years, B+12 will be twice K (remember K = B-2):

B+12 = 2(K) OR B+12 = 2(B-2)

B+12 = 2(B-2)

B+12 = 2B - 4

12 + 4 = B, and B = 16. If the brother is 16, then Kate is 14.

The calculations and logic are correct. If Katie's brother is 16, then Katie is indeed 14 years old.

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For what values of x is the quantity x−9 negative?

Answers

x - 9 < 0
add 9 to both sides:-
x - 9 + 9   < 9
x < 9

x - 9 is negative for all values of x less that 9.

The value of x is the quantity x−9 negative would be negative for all values of x less than 9.

What is algebra?

Algebra is the analysis of mathematical representations, while logic is the manipulation of those symbols.

What is inequality?

Inequality is defined as mathematical statements that have a minimum of two terms containing variables or numbers that are not equal.

To determine the values of x is the quantity x−9 negative

As per the given condition, translate the phrase into an algebraic expression:

⇒ x - 9 < 0

Add 9 to both sides of the inequality,

⇒ x - 9 + 9   < 9

⇒ x < 9

So x - 9 is negative for all values of x less than 9.

Hence, the value of x is the quantity x−9 negative would be negative for all values of x less than 9.

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(3^-2)^4 *3^3 divided by 3^-3

Answers

The answer in exact for is 1/6561 and in decimal form the answer is 0.00015241. Hope I helped!

Write an equation that shows the equivalency between meters and gigameters.

Answers

Below is an equation that shows the equivalency between meters andGigameters:


[tex]10 ^{9} m = 1 Gm[/tex]


The  conversion factor should be used to convert from meters toGigameters should be:

[tex] \frac{1 Gm}{10 ^{9} m } [/tex]
Final answer:

To convert between meters and gigameters, use the equation 1 Gm = 10^9 m. This relationship is important for converting units in scientific and mathematical contexts.

Explanation:

To show the equivalency between meters and gigameters, we can use the following equation:

1 gigameter (Gm) = 10⁹ meters (m).

This equation means that one gigameter is equal to one billion meters. We can use this equivalency for converting measurements from meters to gigameters or vice versa. For example, to convert 2 gigameters to meters, simply multiply 2 by 10⁹ to get 2 x 10⁹ meters.

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If ab= 37 and xy =1/37, what is the value of the product x x b x y x a

Answers

In this case, we are simply asked to find for the value of:

xbya or abxy

 

Since we know that given values of ab and xy, therefore abxy is:

abxy = 37 * (1 / 37)

abxy = 37 / 37

abxy = 1

what is 100/6 as a decimal

Answers

In order to find the "[tex]decimal [/tex]" of this [tex]fraction [/tex] (or any [tex]fraction [/tex] ) you can [tex]divide [/tex] the [tex]numerator [/tex] from the [tex]denominator [/tex]

So,[tex] \frac{100}{6} [/tex] as a [tex]decimal [/tex],  [tex]would [/tex]  most likely [tex]be [/tex]: [tex]16.67 [/tex]

Good luck on your assignment and enjoy your day!

~[tex]MeIsKaitlyn:)[/tex]

Three friends rented a kayak. It cost $4 per hour per person to rent the kayak, plus $2 for each life jacket, and $3 to park the car. It cost $57 in all. How many hours did they spend kayaking? Write an equation and solve.

Answers

They kayaked for 12 hours :)

ABCD is a rectangle. The length of BD is 8 units, and m angle ABD is 67°. The length of AC is units, and m angle CDB is °.

Answers

The length of AC is 8 units The angle CDB is 67° Since ABCD is a rectangle, that means that all of the angles are 90 degrees and that line segment AB is parallel to line segment CD. The line segment BD is a diagonal of the rectangle. The line segment AC is also a diagonal of the rectangle so it has the same length as given for segment BD which is 8. The angle ABD is the angle between the horizontal line and the diagonal. The angle CDB is also the angle between a horizontal line and the diagonal. So it also has the same measurement so it too is 67°.

Answer:

cbd is 23 degrees

Step-by-step explanation:

64 ounces in 8 cups unit rate

Answers

So the unit rate is basically how many ounces in 1 cup?

So since there are 64 ounces in 8 cups, you can just divide by 8, to find how many sets of 8 there are in 64.

64 = 8

64 / 8 = 8 / 8

8 = 1

So there are 8 ounces in 1 cup, which is your unit rate.

Rectangle ABCD is graphed in the coordinate plane. The following are the vertices of the rectangle: A(5, 1), B(7,1) C(7, 6), and D(5, 6). What is the perimeter of rectangle ABCD?

Answers

The perimeter is the sum of all four sides so it would be 2+2+5+5=14

The perimeter of the rectangle ABCD is 14 units after using the distance formula.

What is a rectangle?

It is defined as the two-dimensional geometry in which the angle between the adjacent sides is 90 degrees. It is a type of quadrilateral.

The area of a rectangle can be calculated using the following formula:

Rectangle area = length x width

The missing figure is in the picture, please attached to the picture.

We have:

Rectangle ABCD is graphed in the coordinate plane.

As we know,

The distance formula: it can be defined as the formula for finding the distance between two points. It has given the shortest path distance between two points.

The distance formula can be given as:

[tex]\rm d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]

After using the distance formula:

The perimeter of the rectangle = AB + BC + CD + DA

The perimeter of the rectangle = 2 + 5 + 2 + 5

The perimeter of the rectangle = 14 units

Thus, the perimeter of the rectangle ABCD is 14 units after using the distance formula.

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How can you find the measure of a distance that you cannot measure directly?

Answers

By using porportions, such as the pythagorean therum (a squared plus b squared equals c squared) Good luck!

Enter an inequality that represents the graph in the box.

PLEASE HELP ME!

Answers

the line is solid so we have either ≤ or ≥

find the equation of the line

ok, a y intercept if -1
sllope=rise/run=3/1=3

y=mx+b
m=slope
b=y intercept

y=3x-1 is the equaton

now find if it's y≥3x-1 or y≤3x-1

test a point
we see (0,0) Is not in in it
test it in y≥3x-1
0≥3(0)-1
0≥-1
false,
so this is the equation because (0,0) is not a valid solution for this equation


answer is y≥3x-1

its actually y=>3x-1 because it's shaded below the line.

below the line: < or <=

above the line: > or>=

You are making identical gift bags using 24 candles and 36 bottles of lotion .what is the greatest number of gift bags you can make with no items left over. Show your work

Answers

12 gift bags
6×6= 36
6×4=24

Answer:  12

Step-by-step explanation:

Given : You are making identical gift bags using 24 candles and 36 bottles of lotion .

Then, the greatest number of gift bags you can make with no items left over= greatest common factor of 24 and 36

Prime factorization of 24 and 36 :_

[tex]24=2\times2\times2\times3\\\\ 36=2\times2\times3\times3[/tex]

GCF(24 , 36)= [tex]2\times2\times3=12[/tex]

Hence, the greatest number of gift bags you can make with no items left over =12

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